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Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (2): 44-53.DOI: 10.7522/j.issn.1000-694X.2021.00108

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Coupling effect of water-soil resources in Hexi Area of GansuChina in 2000-2019

Lingge Wang1(), Rui Zhu1(), Zexia Chen1, Zhenliang Yin2, Rui Lu1, Chunshuang Fang1   

  1. 1.Faculty of Geomatics / National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring / Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou Jiaotong University,Lanzhou 730000,China
    2.Key Laboratory of Ecohydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2021-07-13 Revised:2021-08-19 Online:2022-03-20 Published:2022-03-30
  • Contact: Rui Zhu

Abstract:

In this paper, we take the Hexi Corridor of Gansu as the research area, use the coupling coordination model and the agricultural water-soil resource matching coefficient method to quantify the water-soil coupling coordination in the five cities of Hexi Corridor and the middle reaches of the three inland river basins in Hexi Corridor, and on this basis, the influencing factors of soil resources and water resources are analyzed by grey correlation analysis. The main research results are as follows: (1)From 2000 to 2019, the overall coupling coordination degree of water-soil resources in five cities of Hexi has increased by 64.65%, and it is on the verge of imbalance to primary coordination, showing a trend of continuous improvement. Among them, the coupling degree of water-soil resources in Zhangye City and Jiuquan city increased higher. (2)The main factors affecting the coupling coordination of water-soil resources in the five cities of Hexi are the per capita water resources, the total precipitation resources and the total water resources of the water resources system, and the average grain yield, the proportion of cultivated land and the average agricultural output value of the land resources system. (3)In the middle reaches of the three inland rivers in Hexi Corridor, the coupling degree of Shule River Basin is the highest, but it shows a fluctuating downward trend, while the coupling degree of Heihe River Basin and Shiyang River Basin changes little. Therefore, we should continue to adhere to the promotion of water-saving technology, promote the development of agriculture to the direction of high efficiency and low water consumption, pay attention to the rational development and protection of water-soil resources, and gradually realize the efficient allocation of water-soil resources according to local conditions.

Key words: coupling effect of water-soil resources, Hexi Corridor, inland river basins, matching coefficient

CLC Number: